Investigations in Mathematics - Eric S. Rowland
Open-ended problems for high school and college students to "approach creatively and in their own way": Pascal's simplices ("What is the generalization of Pascal's triangle?"), Pythagorean triples, regular polygons ("What is the area of a regular polygon
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IsoDraw - Mervin Bitikofer
IsoDraw is downloadable free-ware for Windows machines that allows students to play on a drawing space with polygons and various isometries. They can place and move multiple reflection lines on the screen, and watch the effects of translations and rotations.
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Isotiles - John Everett
Isotiles are specially designed tiles, in just two triangular shapes, by
which a wide range of topics in geometry can be studied. Topics include: different types of angles; lines and angles; angles of a triangle; isosceles triangles; similar triangles;
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IXL Learning
IXL provides free online practice, organized by grade levels K-8 and aligned to state standards. Choose one math skill from among the hundreds offered, and submit your answer. Respond incorrectly, and click on the "explanation" button to learn more; get
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Japanese Temari - Barb Seuss
Read about the history of this Asian needlework craft, find free patterns to stitch your own geometric designs on the sphere, browse online galleries of temari, and more.
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Jeffrey C. Lagarias
A member of the University of Michigan Department of Mathematics. List of publications, with many available for download in PostScript format; Lagarias' research interests include Number Theory, also Computational Complexity Theory, Cryptography, Discrete
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KaleidoTile - The Geometry Center
A downloadable program for the Macintosh based on the Geometry Center's tiling program on display at the St. Paul Science Museum. You can use KaleidoTile to create and manipulate tessellations of the sphere, Euclidean plane and hyperbolic plane, and to
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Kali - Jeff Weeks
Kali lets you draw symmetrical patterns based on any of the 17 tiling groups. It was written for a broad audience. Even the youngest children enjoy Kali. In particular, Kali does not assume the user knows how to read. For older students, Kali lets students
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Kirigami - Kevin S. Whitley
Kirigami is the Japanese art of making figures out of paper by cutting. This applet lets you create similar figures on your computer by cutting a polygonal wedge from a virtual piece of folded paper. You can change the regular polygon, your wedge, and
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The Knight's Tour - Dan Thomasson
The Knight's Tour web site shows various ways to solve open and closed knight tours. The site also offers several animated tours, artwork, and new concepts (magic squares, tessellations, and conjectures about prime numbers) derived from knight moves on
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Make-a-Flake - Barkley Interactive
Make your own snowflakes online: use the Flash-powered scissors to cut along the edges of a folded piece of virtual paper. Preview the unfolded results along the way; when ready, save your design to the gallery, where you may view and download plans for
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Mark McClure
Mark McClure is an assistant professor at the University of North Carolina at Asheville researching real analysis, specifically fractal measure and dimension. Papers on these topics may be downloaded in gzipped PostScript format; a paper involving Julia
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Math Advantage - Harcourt Brace School Publishers
Java and Shockwave activities (for individual or cooperative group work), sorted by grade level (K through 8); and parent/teacher features within each activities list, with further activities. The main site, the Learning Site, also offers parent and teacher
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Math Art Activities - Zachary J. Brewer
Supplementary art activities for grades 2-4 intended to help teachers introduce, reinforce, or expand on the topics they teach. The online game Forty Frogs helps students conceptualize the process of finding fractions of sets. Read the introduction of
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Math Dance - Karl Schaffer and Erik Stern
The Dr. Schaffer & Mr. Stern Dance Ensemble has performed and conducted workshops on math dance in hundreds of schools and conferences since 1987. From that work, Co-Artistic Directors Karl Schaffer and Erik Stern wrote MathDance, a 132-page book with
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Mathematical Backgrounds - Data Shaping Solutions
An interactive, online background generator for creating mathematical backgrounds with original patterns (fractals, carpets, dithering, etc.), textures, and palettes. Matgrounds could be used by carpet designers, and has produced interesting mathematical
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Mathematical Interactivities - David Hellam
Interactive mathematical challenges, mostly written in Flash, covering number, algebra, data, shape, and space for K-12 students. Site also includes a forum for teachers to discuss this sort of resource, its development, and its use in the classroom.
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Mathematica Packages - Xah Lee
A dozen Mathematica programs, mostly geometry or graphics related. Mathematica is a computer algebra system sold by Wolfram Research Inc. To use these notebooks, you need to have a copy of Mathematica. Mathematica packages and notebooks are plain ASCII
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Mathematics Illuminated - Annenberg Media
A video course for adult learners, high school and college teachers; 13 half-hour video programs, online text, course guide, and Web site; graduate credit available. "Rather than a series of problems to be solved, mathematics is presented as play we engage
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